Aussies want energy-efficient homes: Survey SHARE THIS ARTICLE The REA Insights Energy Efficiency Housing Report analyses the meaningful trends on sustainable and energy-efficient homes through data from 12 million Australians. Energy-efficient homes reduce the demand for non-renewable energy resources, wasted energy usage and greenhouse gas emissions through features such as smart design, insulation, energy-efficient heating and cooling, energy-efficient hot water systems, solar power, ventilation, water recycling systems and more. Advertisement "); googletag.cmd.push(function() { googletag.display('div-gpt-ad-1606778681712-0'); }); } Advertisement According to the April Residential Consumer Omnibus Survey from realestate.com.au, 74 per cent of respondents consider an energy-efficient rating as important.